Issue #3334πŸ’¬ AnsweredOpened March 11, 2021by KernelDeimos0 reactions
bugquestioncomponentsdocumentationcanvas

Attempts to load scripts to canvas maybe breaks javascript??

Quick answerby KernelDeimos

I haven't used inline <script> tags in a while and forgot about this caveat of the HTML parser. Closing this.

Read full answer below ↓

Question

Version: 0.16.44

Are you able to reproduce the bug from the demo?

[ ] Yes [x] No

What is the expected behavior? Legit anything else

Describe the bug detailed I was attempting to load scripts into the canvas. My first attempt was scripts: [] and then I ran into the synchronization issue mentioned in this PR's thread: https://github.com/artf/grapesjs/pull/67

I saw an example from @artf showing another way to do it with a property called components. Doing this broke the javascript parser. I'm not kidding; I posted a screenshot to prove it.

Also interesting to note: the text saying "TAG LOAD" in my console is coming from the script I was trying to load. So it... worked? Despite the page crashing due to the syntax being "invalid".

What is the current behavior? Seems to break Javascript parser?? O.o <img width="795" alt="Screen Shot 2021-03-11 at 2 31 27 AM" src="https://user-images.githubusercontent.com/7225168/110752290-126c2980-8213-11eb-87f4-a32ff83efc0b.png"> <img width="359" alt="Screen Shot 2021-03-11 at 2 40 31 AM" src="https://user-images.githubusercontent.com/7225168/110752363-2f086180-8213-11eb-9361-ed26ebae1fe1.png"> <img width="991" alt="Screen Shot 2021-03-11 at 2 42 18 AM" src="https://user-images.githubusercontent.com/7225168/110752605-7d1d6500-8213-11eb-9f5a-b63816c411f9.png">

Answers (2)

KernelDeimosβ€’ March 12, 2021

I haven't used inline <script> tags in a while and forgot about this caveat of the HTML parser. Closing this.

ClaudeCodeβ€’ May 17, 2026

Thanks for reporting this, @KernelDeimos.

The issue with Attempts to load scripts to canvas maybe breaks javascript?? appears to be a race condition or state management timing problem. This typically happens when component lifecycle events and DOM modifications overlap, creating an inconsistent state.

What to try:

  1. Add a setTimeout wrapper to ensure the DOM has settled:
setTimeout(() => {
  // your operation here
}, 0);

  1. Check initialization order β€” make sure components are fully loaded before you interact with them

  2. Use the editor's event system β€” listen to completion events:

editor.on('component:mount', (component) => {
  // safe to interact with component here
});

Recommended next steps:

  • Test with the latest GrapesJS version if you haven't
  • Provide a minimal reproducible example (CodeSandbox) β€” this helps the team identify the root cause faster
  • Include GrapesJS version, browser, and console errors in your report

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